Friendship, love and loyalty are represented by this historic celtic design. A Ruby claddagh ring with your birthstone or favorite color makes it even more significant. Gem of hot summer nights and steamy red sunsets, ruby is the birthstone of July. Show the world the passions within you with a fiery ruby ring. Gem of hot summer nights and steamy red sunsets, ruby is the birthstone of July. Show the world the passions within you with a fiery ruby ring.